DE68926328D1 - Fernsehsignalstörungsverfahren und -einrichtung - Google Patents

Fernsehsignalstörungsverfahren und -einrichtung

Info

Publication number
DE68926328D1
DE68926328D1 DE68926328T DE68926328T DE68926328D1 DE 68926328 D1 DE68926328 D1 DE 68926328D1 DE 68926328 T DE68926328 T DE 68926328T DE 68926328 T DE68926328 T DE 68926328T DE 68926328 D1 DE68926328 D1 DE 68926328D1
Authority
DE
Germany
Prior art keywords
equipment
television signal
signal interference
interference method
television
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE68926328T
Other languages
English (en)
Inventor
Pierre Blais
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electroline Equipment Inc
Original Assignee
Electroline Equipment Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CA000578353A external-priority patent/CA1324434C/en
Priority claimed from US07/251,579 external-priority patent/US4991206A/en
Application filed by Electroline Equipment Inc filed Critical Electroline Equipment Inc
Application granted granted Critical
Publication of DE68926328D1 publication Critical patent/DE68926328D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/166—Passage/non-passage of the television signal, e.g. jamming, band suppression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/10—Jamming or countermeasure used for a particular application
    • H04K2203/14—Jamming or countermeasure used for a particular application for the transfer of light or images, e.g. for video-surveillance, for television or from a computer screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/44—Jamming having variable characteristics characterized by the control of the jamming waveform or modulation type

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
DE68926328T 1988-09-23 1989-09-22 Fernsehsignalstörungsverfahren und -einrichtung Expired - Lifetime DE68926328D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000578353A CA1324434C (en) 1988-09-23 1988-09-23 Method and apparatus for jamming selected television programs
US07/251,579 US4991206A (en) 1988-09-30 1988-09-30 Method and apparatus for jamming selected television programs

Publications (1)

Publication Number Publication Date
DE68926328D1 true DE68926328D1 (de) 1996-05-30

Family

ID=25672131

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68926328T Expired - Lifetime DE68926328D1 (de) 1988-09-23 1989-09-22 Fernsehsignalstörungsverfahren und -einrichtung

Country Status (2)

Country Link
EP (1) EP0360778B1 (de)
DE (1) DE68926328D1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5289541A (en) * 1988-03-10 1994-02-22 Scientific-Atlanta, Inc. Interdiction method and apparatus with constant blanking and variable dwell times
US5463689A (en) * 1988-03-10 1995-10-31 Scientific-Atlanta Interdiction method and apparatus with random mode jamming
US5287539A (en) * 1988-03-10 1994-02-15 Scientific-Atlanta, Inc. Interdiction program denial system for jamming audio and video signals
US5014309A (en) * 1988-03-10 1991-05-07 Scientific-Atlanta, Inc. Off-premises cable television channel interdiction method and apparatus
US5303295A (en) * 1988-03-10 1994-04-12 Scientific-Atlanta, Inc. Enhanced versatility of a program control by a combination of technologies
WO1993026126A1 (en) * 1992-06-10 1993-12-23 Scientific-Atlanta, Inc. Interdiction method and apparatus with frequency change inhibit function
US5317635A (en) * 1992-06-10 1994-05-31 Scientific-Atlanta, Inc. Interdiction method and apparatus with mode control for variable frequency elements
US5278908A (en) * 1992-06-10 1994-01-11 Scientific-Atlanta, Inc. Interdiction method and apparatus with programmable jamming effectiveness
WO1993026127A1 (en) * 1992-06-10 1993-12-23 Scientific-Atlanta, Inc. Interdiction method and apparatus with direct memory control of variable frequency elements
EP0583869A1 (de) * 1992-08-14 1994-02-23 Electroline Equipment Inc Verfahren und Einrichtung zur Störung mit variabler Frequenz in einer Kabelfernsehanlage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521809A (en) * 1982-12-29 1985-06-04 North American Philips Corporation Method and apparatus for controlling access to selected television programs

Also Published As

Publication number Publication date
EP0360778B1 (de) 1996-04-24
EP0360778A2 (de) 1990-03-28
EP0360778A3 (en) 1990-12-27

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Legal Events

Date Code Title Description
8332 No legal effect for de